Getting the Thumbnail for a Photo or a Video
You can get thumbnails for any image or video posted via yfrog.com. To get an URL for thumbnail just add ":small" prefix to the yfrog URL.
For example:
For the yfrog URL
http://yfrog.com/0fh5rvw4j
the corresponding thumbnail URL is
http://yfrog.com/0fh5rvw4j:small
NOTE: The use of ".th.jpg" suffix to the URL is deprecated. We strongly recommend replacing with the ":small" option.